Saw-swaging machine



2 Sheets -Sheet 1.

(No Model.)

' P. R. WARD.

SAW SWAGING MAGHINE.

No. 326,360. Patented Sept. 1'5, '1885.

WITNESSES ZJVVEJVTOR P a'hp J3. Ward, 39

kz's V Attorneys,

(No Model.) 7 2 sheets-sheet 2 P. R; WARD.

SAW SWAGING MACHINE.

No. 326,360. Patented Sept. 15,1885.

r //l I, I 15 Attorneys.

N. PETERS. Phcloiitllognphur, Willhmglnn. D, c.

. PATENT FFICEO PHILIP R. WARD, OF QUINCY, ILLINOIS.

SAW-SWAGING MACHINE.

SPECIFICATION forming part of Letters Patent No. 326.360,

dated SeptemberIS, 1885,

Application filedJuly 21, 1885. (No model.)

. after and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a machine embodying my invention.

Fig. 2 is a vertical longitudinal central sectional view of the same. Fig. 3 is an end elevation. Fig. 4 is a vertical sectional view taken on the line m x of Fig. 2. Figs. 5, 6, and 7 are detailed perspective views.

The frame of the machine is composed of the sides A, which are preferably of the shape shown, and are long enough to extend for a suitable distance over the toothed edge of the saw that is to have the points of its teeth spread or widened.

Through the sides of the frame, at the ends thereof, near the lower side, extend set-screws B, which bear on opposite sides of the saw and steady the frame thereon.

Re-enforce plates O 'are bolted to the inner sides of sides A, near the front ends of the latter, and in these re-enforce plates are made aligned circular openings D,in which, between the sides, is socketed the circular head 6 of a lever, E. The head 6 has an opening, 6, extending through about two thirds of its circumference, and radially from this opening, and communicating therewith, is a recess, o in which is secured a swaging-die, F. This die is set slightly out of the center of the head e, and is provided with an angular face having the side f, the side f, and a quarter circular shoulder, f, at the upper edge of the side f. A groove, f, is made in the lower side of the die, which groove is of just sufficient width to receive and admit of the passage of the points of the saw-teeth before they are swaged, and communicates at its outer end with a broader segmental opening, 6 made centrally in the lower side of the circular head. The inner end of the groove f, at the swaged.

side f of the face of the die adjacent to the actly corresponds to the shape of the points of the saw teeth when the latter have been The die has a dovetailed groove, f, on its under side, and the lower side of the recess (2 has a dovetailed tongue, 6, which fits in the groovef and secures the die in the recess, and enables the latter to be taken out and replaced when desired.

Aligned openings a are made in the sides eccentrically with respect to the openings D, and through these openings and through the opening 0 in the circular head of the lever extends a mandrel, G, which is keyed in place, and is provided with a flat side, 9, against which the facef of the die closes when the lever is moved.

a represents substantially V-shaped open-' the upper front corners of the sides, and

through the sides above the openings a are made circular openings c through which and through the upper portion of theopening e in the circular head passes a bolt, H. A flat spring, I, is secured at one end to the outer side of one of the sides A, and has its free end, which bears outwardly from the side, above the mandrel.

K represents an operating-lever having bifurcated lower outwardly-curved ends, in, whichstraddle over the upper side of the frame, and are journaled on opposite ends of the bolt H, which thus serves as a shaft.

Secured to the inner side of one ofthe ends the free end of the spring I, and on the outer side of said clamp are made recesses Z which receive the projectingfaces k of the cam when the operatinglever is in the position shown in Fig. 1.

To the operating-lever is pivoted a pawl or latch, M, adapted to engage with the upper end of the lever E, which leverhas an inclined rear side, e, and is slightly rounded at itsupper rear corner, as at e. A stud, m, limits the downward play of the latch M.

The operation of my invention is as follows: The saw to be swaged is secured in a clamp, X, in a horizontal position, teeth upward, and on the upper edges of the clamp Xmy machine is placed, and the screws B set so as to prevent lateral movement of the frame over the saw, the teeth of the latter being in line laterally with the opening a of the circular head of the die-lever and with the groove f 3 in the die, so as to pass therethrough as the machine is moved along over the saw-teeth. The die-lever is in its initial position when, as shown in Fig. 1, one of the teeth of the saw is between the side 9 of the mandrel and the face f of the die. When the operating-lever is moved rearwardly from the position shown in .Fig. l, the projecting faces of the cam k move out of therecesses l of the clamp h and bear on the faces between said recesses of the clamp, forcing the latter inwardly against the pressure of the Spring I, and binding the saw firmly between the roughened ends of the clamps. The clamps remain in this position while the levers are being moved rearwardly. \Vhen the die-lever reach-- es the position shown in Fig. 2, the point of the tooth of the saw that is being operated upon is pinched between the side 9 of the mandrel and the side f of the die, which spreads the point of the tooth laterally on each side, and causes it to fill the recess f, which gives the proper form to the point. After the operating-lever has been moved far enough to cause the die-lever to swage the saw-tooth, its movement is reversed, and the latch M moves over the rounded upper rear corner of the die lever and releases the die-lever, and as the operating-lever continues to move forwardly, the faces of the cam is drop into the recesses of clamp L,and the latter is moved outwardly to release the saw,when the machine is moved far enough to operate on the next tooth, and so on until all the teeth of the saw have been swaged.

A machine thus constructedis adapted for spreading the points of saw-teeth of varying kinds, whether rotary, gang, muley, or other kind of mill-saw.

Adjustable brackets or stops 0 are secured between the sides of the frame by screws P, that pass through vertical slots in the brackets, and these brackets are adjusted by means of bearing-screws S, so as to bear on the points of the saw-teeth, as shown.

Having thus described my invention, I claim 1. The combination, in a saw-swaging machine, of the frame having the mandrel, the die-lever having the die, the operating-lever having the cam, the clampsoperated by the cam for grasping the saw while swaging the teeth, and the spring for moving one of the clamps when released by the cam, substantially as described. 1

2. The combination, in a sawswaging machine, of the frame having the. mandrel, the die-lever having the die, the operating-lever having the latch to engage with the die-lever and move the same and release it when thebolt, the cam for applying the clamps to the PHILIP R. WARD.

Witnesses:

JAS. E. MODAVITT, WILLIAM W. CBALLE. 

